Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 5122b9a342aef7ed…

MALICIOUS

Office (OLE) / .DOC

42.5 KB Created: 2014-09-03 17:55:00 Authoring application: Microsoft Office Word First seen: 2022-11-25
MD5: 6bd532a798f5b473e4237342c3d4d580 SHA-1: 94fc6b15ceb066d61ed5bc97319b297da320c0c9 SHA-256: 5122b9a342aef7ed7e237cc82e99bda2c51efe0182fbdd7d5e377347767bcfc3
302 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample is a malicious Office document containing obfuscated VBA macros. The AutoOpen macro triggers the execution of the 'electrician' subroutine, which in turn calls 'rivulation'. This subroutine uses `CreateObject` to instantiate a `WScript.Shell` object and then calls its `Run` method with a path to a temporary executable file named 'pecological\initiatory.exe'. The embedded URL `http://powerstarthosting.com/l9k7hg4/b4387kfd.exe` is likely the source for this payload.

Heuristics 8

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • CallByName call high OLE_VBA_CALLBYNAME
    CallByName call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://powerstarthosting.com/l9k7hg4/b4387kfd.exe

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
9ab031292c578669b1ce1a53b8fecebb8befa79302de9636b5181564da19a00d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3617 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.